We sell replacement polythene by the metre in various widths with no waste and no cutting charge. Order values less than £100.00 will incur a £4.95 delivery charge. Please see the Delivery Tab for offshore delivery charges.

Our Polythene is supplied with a guaranteed for 7 years against its biggest threat of sunlight degradation. When fitted correctly, it is not uncommon to hear our polythene covers have lasted in excess of 10 years.

Sunlight is the biggest enemy of polythene. While it’s essential for the wellbeing of whatever you’re growing, it also ‘kills’ polythene in much the same way you can find old discarded crisp packets lose their colour and become very brittle. First Tunnels polythene covers are developed and tested in the extreme conditions to give optimum performance and are UV stabilised to prevent the polythene from breaking down prematurely.

Please note – A series of numbers and letters are intermittently to help identify the polythene type and validate the guarantee.

Each face of the Polythene sheet is identical, there is not a right or wrong side when choosing which face goes on the inside or outside of the Polytunnel structure. If condensation is a problem we have Sunclear available which is a non-toxic coating that reduces this effect.

We ask if you are trenching your polytunnel cover or fixing to a base rail because each method requires a different allowance to ensure the polythene cover is secured correctly and lasts as intended; for trenching, we allow an additional 2m (6’6”) of polythene (1m per side). For fixing to a base rail we allow an additional 1m (1’3”) (0.5m per side).